Annals of the South African Museum: Annale Van Die Suid-Afrikaanse Museum |
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Page 81
129 ) , we also note that ' Cryptocrioceras ' occurs with Acrioceras in Zululand -a
situation similar to that found in Boreal and Tethyan Europe where ' Emericiceras
' and ' Paracrioceras ' also occur associated with Acrioceras . Studies on the ...
129 ) , we also note that ' Cryptocrioceras ' occurs with Acrioceras in Zululand -a
situation similar to that found in Boreal and Tethyan Europe where ' Emericiceras
' and ' Paracrioceras ' also occur associated with Acrioceras . Studies on the ...
Page 82
Distinct constrictions occur in M. ampakabense . In addition , Collignon ( 1962 :
20 , pl . 431 ( fig . 821 ) ) also described Menuthiocrioceras sp . indet . from the
Lower Valanginian of Antsalova . The genus Menuthiocrioceras is known mainly
...
Distinct constrictions occur in M. ampakabense . In addition , Collignon ( 1962 :
20 , pl . 431 ( fig . 821 ) ) also described Menuthiocrioceras sp . indet . from the
Lower Valanginian of Antsalova . The genus Menuthiocrioceras is known mainly
...
Page 114
In these , differentiation of ribbing occurs — the major ribs bearing variably
developed umbilical tubercles , very strong ... the compressed variety , ribbing is
dense and prorsiradiate , and only ventral tubercles , linking two to three ribs ,
occur .
In these , differentiation of ribbing occurs — the major ribs bearing variably
developed umbilical tubercles , very strong ... the compressed variety , ribbing is
dense and prorsiradiate , and only ventral tubercles , linking two to three ribs ,
occur .
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Common terms and phrases
according Acrioceras Aguirre Urreta Ancyloceratinae appears Aspinoceras association australis sp authors Barremian bear BMNH body chamber Boreal ceras close coiling coiling Collignon 1962 compared compressed consists Crioceratites Cryptocrioceras described Description developed diameter dimorphism discussion distinct early elongated Emericiceras figured finely flanks followed forms genus Hemihoplites holotype illustrations Immel impression included inner whorls Italy Klinger known lateral lobe locality Lower material Menuthiocrioceras Museum Note occur ornament outer whorls Paracrioceras Patagonia possible preserved Realm recently referred regarded ribs Riccardi & Aguirre rounded Sarkar separate shaft shoulder shows similar single Sornayites South southern Spath specimens stage strong strongly subfamilies suggested suture synonym systematic tabarelli Astier taxonomic Tethyan Thieuloy Thomel trituberculate tubercles type species umbilical uncoiled Upper Upper Barremian variable venter ventral ventrolateral whorl section Wiedmann Wright yrigoyeni Leanza zone zulu sp Zululand
Bibliographic information
| Title | Annals of the South African Museum: Annale Van Die Suid-Afrikaanse Museum Volume 101, Issue 5 of Annals of the South African Museum, South African Museum |
| Author | South African Museum |
| Publisher | South African Museum, 1992 |
| Original from | the University of California |
| Digitized | 21 Jul 2016 |
| ISBN | 0868131288, 9780868131283 |
| Export Citation | BiBTeX EndNote RefMan |